Spencer Kirk T, Weinert Lynn, Avi Victor Mor, Decara Jeanne, Lang Roberto M
Department of Cardiology, University of Chicago, IL 60637, USA.
J Am Soc Echocardiogr. 2002 Dec;15(12):1485-9. doi: 10.1067/mje.2002.126416.
The Tei index is a combined measurement of systolic and diastolic left ventricular (LV) performance and may be more useful for the diagnosis of global cardiac dysfunction than either systolic or diastolic measures alone. We sought to determine whether the Tei index could be accurately calculated from LV area waveforms generated with automated border detection. Twenty-four patients were studied in 3 groups: systolic dysfunction, diastolic dysfunction, and normal. The Tei index was calculated both from Doppler tracings and from analysis of LV area waveforms. Excellent agreement was found between Doppler-derived timing intervals and the Tei index with those obtained from averaged LV area waveforms. A significant difference was seen in the Tei index, computed with both Doppler and automated border detection techniques, between the normal group and those with LV systolic dysfunction and subjects with isolated diastolic dysfunction. This study validates the use of LV area waveforms for the automated calculation of the Tei index.
Tei指数是对左心室（LV）收缩和舒张功能的综合测量，对于诊断整体心脏功能障碍可能比单独的收缩或舒张测量更有用。我们试图确定能否从通过自动边界检测生成的左心室面积波形准确计算出Tei指数。对24例患者进行了分组研究：收缩功能障碍组、舒张功能障碍组和正常组。分别根据多普勒描记图和左心室面积波形分析计算Tei指数。发现多普勒衍生的时间间隔与Tei指数之间，与从平均左心室面积波形获得的结果之间具有极好的一致性。在正常组与左心室收缩功能障碍组以及单纯舒张功能障碍组之间，使用多普勒和自动边界检测技术计算出的Tei指数存在显著差异。本研究验证了使用左心室面积波形自动计算Tei指数的方法。
